Patent US4314854A successfully refreshed from Google Patents.
US4314854A
Expired / Lapsed
US
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Method for the treatment of cellulosic substances with hydrogen peroxide
Assignee: BIORESEARCH CENTER Co Ltd
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Filing: 1981-03-05
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Granted: 1982-02-09
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Expires: 2001-03-05
Abstract
Abstract A method to enhance the reactivity of cellulose-containing materials to cellulase enzymes by treating an aqueous suspension of the material with hydrogen peroxide in the presence of a Mn +2 ion forming manganese compound.
Inventors
- 👤 Motoyoshi Takagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:47
CPC Classifications
C; C13; C13K; C13K1/00; C13K1/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
49 words
A method for treating cellulosic materials to be enzymatically converted to sugars which comprises contacting an aqueous suspension of the material with 0.1 to 10 weight percent of hydrogen peroxide in the presence of 1/10 to 1/1000 mole ratio against hydrogen peroxide of a Mn +2 ion producing material.
Claim 2
Independent Claim
49 words
A method for treating cellulosic materials to be enzymatically converted to sugars which comprises contacting an aqueous suspension of the material with 0.1 to 10 weight percent of hydrogen peroxide in the presence of 1/10 to 1/1000 mole ratio against hydrogen peroxide of a Mn +2 ion producing material.
Claim 3
Dependent Claim
14 words
The method of claim 1 wherein the Mn +2 producing material is manganese sulfate.
Claim 4
Dependent Claim
22 words
The method of claim 1 wherein the cellulosic material suspension contains from about 1 to about 50 weight percent of cellulosic material.
Claim 5
Dependent Claim
34 words
The method of claim 1 wherein the contacting is carried out at from about ambient room temperature to about the boiling point of the mixture for from about 30 minutes to about 24 hours.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-02-08 | 1985-08-10 | 1986-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-08 | 1989-08-10 | 1990-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-08 | 1993-08-10 | 1994-02-09 | $7700.00 | Window Closed / Lapsed |